diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0016-spi-bcm2835-Disable-forced-software-CS.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0016-spi-bcm2835-Disable-forced-software-CS.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0016-spi-bcm2835-Disable-forced-software-CS.patch b/target/linux/brcm2708/patches-4.9/950-0016-spi-bcm2835-Disable-forced-software-CS.patch new file mode 100644 index 0000000..5d4062c --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/950-0016-spi-bcm2835-Disable-forced-software-CS.patch @@ -0,0 +1,34 @@ +From c0aaf0d4213bfc9df85c397cd974f7a6f15255f2 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Fri, 1 Jul 2016 22:09:24 +0100 +Subject: [PATCH] spi-bcm2835: Disable forced software CS + +Select software CS in bcm2708_common.dtsi, and disable the automatic +conversion in the driver to allow hardware CS to be re-enabled with an +overlay. + +See: https://github.com/raspberrypi/linux/issues/1547 + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/spi/spi-bcm2835.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/drivers/spi/spi-bcm2835.c ++++ b/drivers/spi/spi-bcm2835.c +@@ -707,6 +707,7 @@ static int bcm2835_spi_setup(struct spi_ + return -EINVAL; + } + ++#if 0 + /* now translate native cs to GPIO */ + /* first look for chip select pins in the devices pin groups */ + for (pingroup_index = 0; +@@ -756,6 +757,7 @@ static int bcm2835_spi_setup(struct spi_ + spi->chip_select, spi->cs_gpio, err); + return err; + } ++#endif + + return 0; + } |